# Fast Molality Calculator vs FlowStation

The clearest difference is ads: FlowStation at none against Fast Molality Calculator's shown. FlowStation also leads on update cadence (every 2 weeks vs every 35 months). Fast Molality Calculator's advantage is iOS requirement (15.0 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fast Molality Calculator ships an update every 35 months, FlowStation every 2 weeks. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Fast Molality Calculator | FlowStation |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 35 months | **Every 2 weeks** |
| Size | 30 MB | 20 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [JIN-HYUNG KIM](https://appshunter.io/developer/1692050199) | [Miguel Faggioni](https://appshunter.io/developer/1871340241) |

## What reviewers say

### Fast Molality Calculator

[App page](https://appshunter.io/ios/app/fast-molality-calculator/id6451112827)

**Features:** macOS Compatibility

**In-app purchases:** none


### FlowStation

[App page](https://appshunter.io/ios/app/flowstation/id6753075994)

**In-app purchases:** none


## Frequently asked questions

### Is Fast Molality Calculator free?

Fast Molality Calculator is free to download, with no in-app purchases.

### Is FlowStation free?

FlowStation is free to download, with no in-app purchases.

### Do Fast Molality Calculator or FlowStation have ads?

Fast Molality Calculator shows ads; FlowStation does not.

### Which is updated more often, Fast Molality Calculator or FlowStation?

Fast Molality Calculator ships an update every 35 months, and FlowStation every 2 weeks. Most recently, Fast Molality Calculator was updated on October 25, 2026 and FlowStation on October 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*